Paper-folding machine



L. A. STRAUBEL.

PAPER FOLDING MACHINE.

APPLICATION FILED APR. 9. 1921.

Patented July 18, 1922.

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L A STRAUBEL PAPER FOLDING MACHINE. APPLICATION FILED APR. 9, 1921.

.L. A. STRAUBEL.

PAPER FOLDING MACHINE.

14tg3jg76, APPLICATION FILED APR-9,1921. 189

4 SHEE1S-SHEET 3- unis AQSTrauh E1 L. A. STRAUBEL.

PAPER FOLDING MACHINE.

APPLICATION FILED APR. 9, 1921.

Patented July 18 1922.

4 SHEETS-SHEET 4.

LU'UIS A STRAUBEL, F GREEN BAY, WISGQNSIN.

rnnnnrornnre nsonin'n Specification of Letters Patent.

Patented Qlnly l8,

Application filed April 9, 1921. Seriel Ito, 469,666.

T 0 all whom it may concern:

Be it known that l, Loors A. Srnsnnnn, a citizen of the-United States, and resident or Green Bay, in the county of Brown and State of Wisconsin, have invented certein' new end useful Improvements in Pepen Folding Machines; and l do herehy declere that the following is a, full, clear, and exact description thereof.

iii

, tinuous driven folding and interfolding' Sail till

My invention relates to improvementsin folding machines and more perticnlsrly to thet type of machines employed for the purpose of producing packages of materiel such c as toilet paper and paper toweling, composed cam controlled reciprocating and interinit tent movement of the folding mechenism, which movement greatly reduces the copecity or the machine, and providing conmeens. i Another ob ect lies in the provision. of felting members operating and arranged in such n nisnner es'to permit the paper to be led between them, and the stock or package support, thereby providing greeterspace for movement of the folding members,

Another object resides in the provision of means sdepted 'toflpress end grip the folds of paper, and ehthe some time feed the stock or packege trom the mtmhine A more specific object is to provide it mos,

chine of this general chere-cter, with en inclined stack or pa clrege support, whereby the stack is under slight pressure et all times and displacement of the interfolded le'ovcsis prevented,

With these and other objects in View, which will be apparent es the description proceeds, my invention consists in what is herein shown and described, and more perticulerly defined in the appended cleims.

in the drawings: Figure 1 is an end elevetionol viewr of on interfolding machine embodyingthepresent invention, with parts in section as indicstedby line 1-1 of Figure 2.

Figure. 2 is an elevetionel view looking in at the front of the mechine.

L p my invention is to Figure 3 is e trensverse sectionel view on the line 3-3 of Figure 1, end i t Figure e is eview similer to thet of Figure 3, showing the folding mechsnism in the reverse position. v

Referring now more particularly to the longitudinally jonrnelled e sheft o carrying the body roll 7 of the feeding end cutting mechnnisrn, Mounted adjacent opposite sides of the body roll are e pair of rubber faced feed rolls 8 journelled upon the shafts 9, which are carried in the brackets 10 pivoted to the side trainee. The feed rollers 8 are adjusted and held in contsct with bod occompstudying drawings, the improved rnnchine comprises side fro-mes 5,111 which is ill roll 7, by means of the set screws 11, three ed in lugs 11' of the side frames 5 end engaging the pivoted breckets l0:

Also jonrnelled in the side frames 5 end disposed directly shove the body roll is n 13 provided withe pair of oppositely disposed longitudinal slots It, -in whic. are

secured cutting knives 15 adopted to transversely out the work materiel passing over the body roll. vTo compensate for the cutting. knives 15, the body roll is provided with longitudinal recesses 16 for the reception of the seme,end as is common in otherinechines of thisneturc, the cutting roll and body roll are so timed as to permit "the knives and. corresponding recesses of the body roll to register during their revolutions. c c

Extending longitudinally through the me- ,chinie, sndmoun'ted in the side frames El ere e po irfof stationery shafts 17, on which are secured o plurality of vertical guides 18 having their upper ends projected into ennular grooves 19, provided in the-body roll end teed .roll8 positioned edjscent the-dischsrge' side of the body roll: v

Positioned directly below the hody roll 7 ere a pair of spaced broking rolls 20 mounted on the shsfts Mend 21", the sheft 2i- 1 shaft 12, on which is mounted e cutting roll ice being journelled in the side irsmes 5, while the shaft 21 has its hearings in the brackets 22 pivoted tothe side frames; rte rollers 20 are normally urged sport by springs 23 disposed between the pivoted brackets 2%,

and the"journels provided in the side frame 5 for the'sheft 2 1. Portions of the rollers 20 are provided with corrugated ruhloer feces 20 ndspted'to engege end grip the worlr. no

material fed between the rolls, and due tov the fact that these rolls are timed to travel at a greater speed than the feed rolls, the work material will be severed at the point where it has been cut by the transverse cutment of the braking rolls toward each other to insure gripping of the material between faces is attained by set screws 2e, thread ed in the side frames and engaging the brackets 22. The rollers 20 are further provided with annular grooves 19, which, per mit the lower ends of the guides 1-8 to extend therethrough.- i j Taking up the folding mechanism ofthe machine, a pair of vertically aligned-presser flaps 25 extending longitudinally through the machine are'positioned below the braking rolls 20, adjacent one side of the path of work material fed therefrom. Positioned adjacent one sid'eof the presser flaps, car- .ried by the side frames 5, is a horizontal stack support 25 provided with an inclined surface 25" for that purpose, which will be more particularly described in the operation of the machine.

flaps 25 are journalled in the side frames 5,

The ends of the presser whereby the flaps may be oscillatedin con- 'unction with the tucking blades 26, which 7 lades are secured to the arms 27 mounted -upon the ,verticall aligned shafts "28, also extending longitu inally throu h the ma-- chine and journalled in the side frames. The upper and lower ress'er flaps have one of their journalled en s extended outwardly of the side frames, at opposite sides of the machine, and have keyed thereon arms29.

v These arms are connected, by means of the links31, to belLcranks 3O keyed upon the shafts 28 at opposite sides of the machine outwardly of the side frames. Oscillatory 'moyement is imparted to the bell-cranks 30 through the connecting links 32 fastened to thecrank heads 33, which are mounted upon thelongitudinal shaft 34v journalled in the side frames 5 rearwardly of the machine.

A drive for the various parts of the machine is obtained through a suitable train of gears, mounted upon the various shafts outwardly of'the side frames 5. enters the machine through the pulley 35 mounted upon the'sha'ft 6, which shaft also, carries a gear 36 that drives the gear 37 mounted on the shaft 12 of the cutting roll. The opposite end of the shaft 6 is provided with a gear 38, which drives the idler gear 39 mounted upon a stud a0 carried by one of the side frames 5. From the idler gear 39, power is transmitted to the braking rolls 'fOldSiIl the work material;

,same time, acting toguide the end of the Power by direct gear drive,with the exception of the oscillatory tucking blades and presser flaps,'which derive their movementthrough links connected to the cranks 33. In other words, abrupt reciprocating-movements and cams are eliminated, thereby greatly simplifying the'mechanism of the machine and at thesame time, increasing its capacity to a maximum. l

Considering the operation of the machine, particular attention is directed toFigures 3 and 4 wherein it will be seen that the work material is fed over the body roll 7 between the feed rollers 8, where itis transversely cut into the desired length. From the body roll, it passes through the guides 18 to a point where it is engaged by the gripping surfaces of thebraking rolls 20, and fed to the folding mechanism, which com rises the presser flaps and tucking blades. t will be noted in this particular type of folding mechanism that each section or sheet of work material receives two folds, and the succeeding sheet isv fed into the last fold, in

package or -stack.-

The presser' flaps are oscillated through a limited arc, from a vertical position to that of approximately 45 degrees, at which point they receive thetucking blades to form the As shown in F gure 3, the upper fold is held against the stuck by the-upperpremer flap, while the lower flap is at its outward limit and the tucking blade has iormedthe lower fold. It will be'noted'that the-succeeding sheet of material is then fed into the lower fold and is guided between the upper pressure flap and the tucking blade. To obtain the. last or'upper fold on. the succeeding sheet, both the .presser flaps and tucking blades are-os-,v cillated to that position shown in Figure 4. whereby the lowerfold is gripped and. held against the stack by the lower pgessure flap, and the tucking blade enters the upper pres ser flap forming the upper fold, and: at the preceding sheet into the same.

As the presser blades oscillate to engage the work material, it will obviously be seen that the stack is fed upon the support, which due to its incline, necessitates a certain amount of pressure being exerted upon the stack, which pressure not only causes the folds of the Work material to be thoroughly pressed, but firml holds the same against displacement.

maaare Particular attention is directed to the fact that the work material is fed to the preceding fold between the tucking blades and pres ser flaps, as best illustrated in Figure 3, whereas in former practice, it has been customary to position both the tucking blades and resser flaps to one side of the work material thereby crowding this mechanism and greatly limiting its movement. The present structure overcomes this disadvantage,lal-' lowing ample room for movement of the tucking blades.

From the foregoing, it Will betseen that a sim 1e, eflicient mechanism has been designe which, due to certain novel features in the construction, will permit a maximum output for machines of this character, and while I have shown and described a specific mechanism for carrying out the invention, it is understood that various changes in minor details of. construction are contemplated within the scope of the appended claims.

ll claim:

1. In a machine of the class described, the

3. In a machine of the class described, the combination of, means for partially cutting and feeding the work material, a pair of rolls driven at a reater speed than the feeding means and a apted to sever the cut portion of work material, and means for folding and interfolding the severed sheets into packages, comprising, a pair of oscillatory presser flaps and a pair of oscillatory tucking blades adapted to operate in conjunction with said presser flaps.

4. In a machine of the class described, the combination of, means for partially cutting and feeding the work material, a'pair of rolls driven. at a greaterspeed than the feed-- ing means and adapted to sever the cut portion of work material into sheets, means for folding and interfolding the sheets into packages, and a support positioned adjacent said folding and interfolding means to receive the package fed thereto, said support being provided with an incline.

5. In a machine of the class described, the combination of means for partially cutting and feeding the work material, means for folding said Work material into books of three or more leaves, and a pair of rollers driven at a greater speed than the feeding means for severing the cut'portion of Work material and delivering the same into the last fold of the preceding sheet.

In testimony that I claim the fore oing I have hereunto set my hand at Green ay, in the county of Brown and State of Wisconsin.

LOUIS A. STRAUBEL. 

